A new route for the formation of self-organized anodic porous alumina in neutral electrolytes

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• 作者：Hiroaki Tsuchiya ; Steffen Berger ; Jan M. Macak ; André ; s G. Muñ ; oz ; Patrik Schmuki
• 关键词：Alumina ; Self-organized ; Nanoporous ; Fluoride
• 刊名：Electrochemistry Communications
• 出版年：2007
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：April 2007
• 卷：9
• 期：4
• 页码：545-550
• 文件大小：1108 K

摘要

The present work reports the formation of regular porous aluminum oxide layers in neutral fluoride containing (NH₄)₂SO₄ electrolytes. For a fluoride free (NH₄)₂SO₄ electrolyte only irregular and thin porous alumina layers can be grown under these conditions. Upon addition of small amounts of fluorides highly regular, smooth high aspect ratio pore arrays can be produced. Pores with a typical diameter of approximately 50 nm and a length of several micrometers are formed. This finding significantly widens the spectrum of synthesis routes for ordered porous alumina structures and templates.